Volume 22, Issue 2 (JIAEEE Vol.22 No.2 2025)                   Journal of Iranian Association of Electrical and Electronics Engineers 2025, 22(2): 0-0 | Back to browse issues page

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Hemmati M J. Design and simulation of new ten-phase ring oscillator by coupling of two identical voltage controlled oscillators. Journal of Iranian Association of Electrical and Electronics Engineers 2025; 22 (2)
URL: http://jiaeee.com/article-1-1697-en.html
Design and simulation of new ten-phase ring oscillator by coupling of two identical voltage controlled oscillators
Mohammad Jafar Hemmati *
Sirjan University of technology
Abstract:   (133 Views)
In this paper, a new configuration of ten-phase ring voltage controlled oscillator (RVCO) is introduced. The introduced oscillator is realized by coupling of two identical five-stage ring oscillators. Coupling of the identical VCOs is done by reusing some of the active devices employed in the proposed circuit without using the extra components. Stages of each core VCO are derived from the current-starved delay cell. Due to the crosswise coupling, the signals at the common mode nodes of one VCO are injected into the other, and vice versa which this interaction forces the proposed circuit to generate ten output voltages with same amplitudes and frequencies. The proposed oscillator achieves a frequency tuning range of 60 % and produces ten output signals with 36o phase difference. The proposed circuit can oscillate from 1.1 GHz to 2.05 GHz by varying the controlling voltage from 0.55 V to 0.85 V. The circuit phase noise is -99.25 dBc/Hz at 1 MHz offset frequency and its figure of merit is -184 dBc/Hz.  

 
Keywords: Ring voltage controlled oscillator, phase noise, frequency tuning range, Current-Starved cell.
     
Type of Article: Research | Subject: Electronic
Received: 2024/02/14 | Accepted: 2025/03/1
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